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Commit cf089455 authored by Feng Tang's avatar Feng Tang Committed by H. Peter Anvin
Browse files

x86, mrst: Add vrtc platform data setup code 



vRTC information is obtained from SFI tables on Moorestown, this patch parses
these tables and assign the information.

Signed-off-by: default avatarFeng Tang <feng.tang@intel.com>
LKML-Reference: <43F901BD926A4E43B106BF17856F07559FB80D0D@orsmsx508.amr.corp.intel.com>
Signed-off-by: default avatarJacob Pan <jacob.jun.pan@intel.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 16ab5395

arch/x86/include/asm/mrst.h

+2 −0
Original line number Diff line number Diff line
@@ -11,7 +11,9 @@ 
#ifndef _ASM_X86_MRST_H

#define _ASM_X86_MRST_H

extern int pci_mrst_init(void);

int __init sfi_parse_mrtc(struct sfi_table_header *table);



#define SFI_MTMR_MAX_NUM 8

#define SFI_MRTC_MAX	8



#endif /* _ASM_X86_MRST_H */

arch/x86/kernel/mrst.c

+45 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/kernel.h>

#include <linux/sfi.h>

#include <linux/irq.h>

#include <linux/module.h>



#include <asm/setup.h>

#include <asm/mpspec_def.h>
@@ -27,6 +28,10 @@ static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM]; 
static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM];

int sfi_mtimer_num;



struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX];

EXPORT_SYMBOL_GPL(sfi_mrtc_array);

int sfi_mrtc_num;



static inline void assign_to_mp_irq(struct mpc_intsrc *m,

				    struct mpc_intsrc *mp_irq)

{
@@ -126,6 +131,46 @@ void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr) 
	}

}



/* parse all the mrtc info to a global mrtc array */

int __init sfi_parse_mrtc(struct sfi_table_header *table)

{

	struct sfi_table_simple *sb;

	struct sfi_rtc_table_entry *pentry;

	struct mpc_intsrc mp_irq;



	int totallen;



	sb = (struct sfi_table_simple *)table;

	if (!sfi_mrtc_num) {

		sfi_mrtc_num = SFI_GET_NUM_ENTRIES(sb,

						struct sfi_rtc_table_entry);

		pentry = (struct sfi_rtc_table_entry *)sb->pentry;

		totallen = sfi_mrtc_num * sizeof(*pentry);

		memcpy(sfi_mrtc_array, pentry, totallen);

	}



	printk(KERN_INFO "SFI: RTC info (num = %d):\n", sfi_mrtc_num);

	pentry = sfi_mrtc_array;

	for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) {

		printk(KERN_INFO "RTC[%d]: paddr = 0x%08x, irq = %d\n",

			totallen, (u32)pentry->phys_addr, pentry->irq);

		mp_irq.type = MP_IOAPIC;

		mp_irq.irqtype = mp_INT;

		mp_irq.irqflag = 0;

		mp_irq.srcbus = 0;

		mp_irq.srcbusirq = pentry->irq;	/* IRQ */

		mp_irq.dstapic = MP_APIC_ALL;

		mp_irq.dstirq = pentry->irq;

		save_mp_irq(&mp_irq);

	}

	return 0;

}



void __init mrst_rtc_init(void)

{

	sfi_table_parse(SFI_SIG_MRTC, NULL, NULL, sfi_parse_mrtc);

}



/*

 * Moorestown specific x86_init function overrides and early setup

 * calls.